Ferroelastic Fingerprints in Methylammonium Lead Iodide Perovskite
Type
ArticleAuthors
Hermes, Ilka M.Bretschneider, Simon A.
Bergmann, Victor W.
Li, Dan
Klasen, Alexander
Mars, Julian
Tremel, Wolfgang

Laquai, Frédéric

Butt, Hans-Jürgen
Mezger, Markus
Berger, Rüdiger
Rodriguez, Brian J.
Weber, Stefan A. L.
KAUST Department
KAUST Solar Center (KSC)Material Science and Engineering Program
Physical Science and Engineering (PSE) Division
Date
2016-03-04Online Publication Date
2016-03-04Print Publication Date
2016-03-17Permanent link to this record
http://hdl.handle.net/10754/596362
Metadata
Show full item recordAbstract
Methylammonium lead iodide (MAPbI3) perovskite materials show an outstanding performance in photovoltaic devices. However, certain material properties, especially the possible ferroic behavior, remain unclear. We observed distinct nanoscale periodic domains in the piezoresponse of MAPbI3(Cl) grains. The structure and the orientation of these striped domains indicate ferroelasticity as their origin. By correlating vertical and lateral piezoresponse force microscopy experiments performed at different sample orientations with x-ray diffraction, the preferred domain orientation was suggested to be the a1-a2-phase. The observation of these ferroelastic fingerprints appears to strongly depend on the film texture and thus the preparation route. The formation of the ferroelastic twin domains could be induced by internal strain during the cubic-tetragonal phase transition.Citation
Ferroelastic Fingerprints in Methylammonium Lead Iodide Perovskite 2016 The Journal of Physical Chemistry CPublisher
American Chemical Society (ACS)Additional Links
http://pubs.acs.org/doi/abs/10.1021/acs.jpcc.5b11469ae974a485f413a2113503eed53cd6c53
10.1021/acs.jpcc.5b11469